Abstract
In this paper, in order to achieve certain one-dimensional (1D) topological edge states, we provide a method to construct an edge configuration from the two-periodic structures. Those two-periodic structures have different Zak phases that lead to some topological edge states found in the transmission spectrum. A field distribution shows the intense field localization effect around the interface. When the structure includes nonlinear material, the intense field localization field at the interface will result in nonlinear effect. The simulation based on a finite-difference time-domain (FDTD) method demonstrates that the topological edge states can result in the third-order harmonic (TH) generation.
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